Superconducting proximity effect on Dirac electron sytstems

2014 Fiscal Year Final Research Report

• Project/Area Number: 24540375
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Hiroshima University
• Principal Investigator: TAKANE Yositake 広島大学, 先端物質科学研究科, 教授 (40254388)
• Research Collaborator: IMURA Ken-ichiro 広島大学, 大学院先端物質科学研究科, 助教 (90391870)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 物性理論

Outline of Final Research Achievements

We have investigated the superconducting proximity effect on Dirac electrons which appear in graphene sheets and topological insulators. We have developed a general quasi-classical theory of the Josephson effect in graphene, and have derived a general effective model for Dirac electrons under the superconducting proximity effect. These theoretical frameworks enable us to accurately describe the proximity effect in Dirac electron systems beyond ordinary phenomenological models.
As the subject related to those mentioned above, we have also developed the theoretical framework to describe Dirac electrons on a surface of topological insulators.

Free Research Field

物性物理学